Samples taken from stock piles of Koyunagili Lignites Company preparation plant were cleaned by means of gravity methods to obtain a saleable product. The optimum conditions of separation were determined under the laboratory conditions by using a shaking table and multi-gravity separator Samples were wet sieved into four size fractions: +0.5 and -0.5 + 0.3 mm size fractions were cleaned by shaking table, and -0.3 + 0.053 mm fraction was cleaned by multi gravity separator; 0.053 mm fraction was not used in the experimental work. After the experimental work, clean coal products containing 4,849 kcal/kg calorific value, 20.53% ash with 28.98% combustible recovery; 5,115 kcal/kg calorific value, 20.03% ash with 35.42% combustible recovery; and 5,165 kcal/kg calorific value, 18.71% ash with 83.62% combustible recovery were obtained at +0.5, -0.5 + 0.3, -0.3 + 0.053 mm fractions, respectively.